You may have swollen armpit lumps due to infections, cysts, or vaccines. In severe cases, some armpit lumps could be a sign ...

A persistent, painless, or growing lump may signal lymphoma. Doctors explain warning signs, B symptoms, diagnosis, and modern treatment options.

People with underarm hidradenitis suppurativa often develop armpit abscesses, painful lumps under the skin that are filled with pus. Usually caused by a bacterial infection, they can appear red and ...

Right-sided pain under the armpit may be due to muscle strain, infections, or skin conditions. Sometimes, armpit pain may indicate a more serious issue, such as cancer or a heart issue. The armpit ...